Water-purifying apparatus for steam-boilers.



No. 773,915. PATENTED NOV. 1, 1904.

I D. BEST. I

WATER PURIFYING APPARATUS FOR STEAM BOILERS. APPLICATION FILED MAR. 14,1904.

N0 MODEL.

m'tnesses: fizz/ endor Patented November 1, 1904.

PATENT OFFICE.

DANIEL BEST, or SAN LEANDRO, CALIFORNIA.

WATER-PURIFYING APPARATUS FOR STEAlVl -BOILERS.

SPECIFICATION forming part of Letters Patent No. 773,915, dated.November 1, 1904.

Application fil d March 14., 1904. Serial N0. 198,001. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL BEST, a citizen of the United States,residing at San Leandro, in the county of Alameda and State ofCalifornia, have invented new and useful Improvements in ater-PurifyingAttachments for Steam-Boilers, of which the following is aspecification.

My invention relates to an attachment for steam-boilers which isdesigned to separate the impurities from the feed-water of such boilersprevious to its being introduced directly into the boiler.

It consists of an attachment having retaining-surfaces, means forsupplying water to pass over said surfaces under the influence of heatfrom the boiler, and means for delivering the purified water into theboiler.

It comprises combinations of parts and details of construction, whichwill be more'fully explained by reference to the accompanying drawing,in which the figure is a sectional elevation of an upright boiler,showing my at-- tachment.

The great difliculty encountered in the use of steam-boilers is in theprocurement of sufficient pure water for steam purposes and to preventthe deposit of sediment or impurities which the water may carry withinthe boiler itself.

It is the object of my invention to provide a device forming anessential part of the boiler whereby the water may be substantiallyfreed from all or the greater portion of such impurities before it isadmitted to the main portion of the boiler.

It will be understood that this apparatus may be applied to anywell-known or ordinary form of fire or water tube boiler, eithervertically inclined or horizontal.

I have here illustrated my invention as applied to the vertical type ofboiler.

A represents the shell of the boiler, having a fireplace or furnace B inthe lower part, with the usual surrounding water-legs connecting withthe interior of the boiler.

C represents fines. or tubes of the ordinary description fixed in theboiler.

2 represents the convergent head from which thesmoke-stack 3 arises andthrough which the products of combustion are ordinarily discharged.Surrounding this head is an extension 4 of the boiler, which is hereshown .as being cylindrical in shape: and having a top 5 extendinginwardly to the upper part of the head or base of the smoke-stack, asshown. These parts are properly stayed and form a chamber exterior tothe smoke-stack. Around the interior of this head are retaining-surfaces5. In the present case I have shown these surfaces in the form ofspirally-disposed plates fixed to the outside of the cone and 7 withinthe exterior chamber; but it will be manifest that the surfaces may bevariously disposed, dependent upon the character of the boiler to whichthey are applied.

6 is a pipe connected with any source of water-supply, and through thispipe water is delivered into the upper part of the chamber, falling uponthe upper retaining-surfaces and in the present construction flowingaround the spiral and discharging at thelower end thereof into thebottom of the exterior chamber.

7 is a steam-pipe having a suitable controlling valve or cock 8. Thispipe has its lower end connecting with the upper part of the steam-spaceof the boiler, and the upper end discharges into the purifying-chamber,so that steam from the boiler is delivered intov this chamber, and thechamber is also subjected to the direct heat of the escaping products ofcombustion through the interior cone.

It will be understood that exhaust-steam from the engine may also beemployed in lieu of the live steam, the object being in any event toraise the temperature of the water which is introduced into this chamberto such a point that the impurities carried by the water will bedeposited upon the retaining-surfaces within the chamber.

9 is a pipe having its upper end connected with the lower part of thispurifying-chamber and the lower end delivering water to the lower partof the boiler, here shown as opening into the water-leg around thefurnace. This pipe is preferably connected with the purifying-chamber ashort distance above the bottom, and this provides for a quiet body ofwater at the bottom of said chamber in which the disengaged impuritieswill have an opportunity of settling.

10 represents handhold-plates arranged in the top of thepurifying-chamber, and 11 are similar handhold-plates covering openingsaround the lower part. These openings allow ample ingress for cleaningout the purifyingchamber from time to time. If the temperature of thechamber be hot enough to convert all or a portion of the feed-water intosteam, this steam will be transmitted to the boiler through theconducting-pipe.

Having thus described my invention, what 1 claim, and desire to secureby LettersPatent, is

1. The combination with a steam-boiler, of a convergent head surmountingthe boilercasing and from which head the smoke-stack arises, anextension of the boiler-casing surrounding the convergent head andsecured to the lower end thereof, said head provided withretaining-surfaces, means for admitting steam to heat the watercontained in said head, and a conducting-pipe connecting with the boilerand having its upper end connected with the chamber of the extension ata point above the lower end of the head.

2. The combination with a boiler, of a cas ing surmounting the same andforming an extension thereof, an upwardly-converging head within saidextension and having its lower L portion secured to the inner wallthereof; whereby the upper part of the extension forms a closed chamber,means for supplying l water to the upper part of the chamber, a seriesof retaining-surfaces over which said water passes, means for admittingsteam to the chamber to heat the water, and a waterconducting pipeconnecting the chamber with the boiler.

3. The combination with a boiler, of a supplemental chamber forming anextension of the boiler-casing, an upwardly-converging head within saidextension and having its lower edge secured to the inner wall of thechamber, said head having a spirally-disposed retaining-surface on itsouter surface,a smokestack leading from the head, means for supplyingwaterto the upper part of the chamber to pass over said surface, meansfor admitting steam to heat the Water and deposit the impurities uponsaid surface, anda waterconducting pipe leading from a point above thebottom of the chamber to the boiler.

4. The combination with a boiler and an extension thereof forming asupplemental chamber around the upper part, a heat-conducting coneextending through said chamber; and having its lower portion secured tothe inner wall of the extension to close said portion and form asettling-basin, said cone connecting With the stack, retaining-surfacesfixed to the cone within the chamber, means for supplying Water to flowover said surfaces, means for admitting steam to said chamber, asettling-chamber located in the lower part of the main chamber, and apipe connecting that portion above the settling-chamber, with theinterior of the boiler.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

DANIEL BEST.

Witnesses:

S. H. NOURSE, D. B. RICHARDS.

